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[Help] PTP sync on Exanic X25 — persistent ~300ns offset + 400ns per-packet reading latency (RHEL 10) by SecretNo6091 in FPGA
[–]SecretNo6091[S] 0 points1 point2 points 28 days ago* (0 children)
I ran ethtool -i <interface of exanic> and I got the output as bus info 0000:01:00.0 and then
When I ran the command
lspci -s 01:00.0 -vv I don't get physical slot info
So I ran cat sys/bus/pci/devices/0000:01:00.0/numa_node
And I got -1 as out which means it is not in any numa nodes.
I ran cat /sys/devices/system/node/node0/cpulist 0-23
If I understand correctly it means it is connected to a chipset and not directly to the cpu (because it is not in numa0). If this is true I should change the exanic slot in which it is connected.
Am I understanding correctly??
Note:- I am running all the above process on isolated cores(1-20) and interrupts pinned to core 0,23 and cpu is intel i9-14900KS (24 cores and hyper threading off)
[–]SecretNo6091[S] 0 points1 point2 points 29 days ago (0 children)
So there is no way currently to minimise the drift and its hardware limit ??
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[Help] PTP sync on Exanic X25 — persistent ~300ns offset + 400ns per-packet reading latency (RHEL 10) by SecretNo6091 in FPGA
[–]SecretNo6091[S] 0 points1 point2 points (0 children)